Confessed to the shooting he bought the ar15 he used in the shooting legally one year ago. Right now authorities still do not have a motive. We have team coverage. Our dawn timmeney has been speaking with students and parents in our area. Jeff cole deviling into what can happen to make schools safer. And our Dave Schratwieser is on top of how authorities investigate tips about people believed to be threats. But we begin with whats happening right now in south florida. Heres foxs caroline shively. Reporter more than a dozen students are dead. And officials are still trying to find out what motivated the suspected shooter. But theyre also learning more about 19yearold nikolas cruz. Who allegedly carried out the shooting by himself. Using a legally purchased ar15 rival. He looked like a Typical High School student, and for a quick moment i thought could this be the person . Is this who i need to stop . Reporter suspect reported hal a troubled past and was expelled from the school. And the